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If global carbon dioxide emissions don't begin dropping by 2020, the temperature goals set in Paris become almost unattainable, and the U.N.'s Sustainable Development Goals would be at grave risk. But it's still possible to meet the Paris temperature goals if emissions begin to fall by 2020, Christiana Figueres and two colleagues argue. Ina commentary they published recently in Nature, the authors set out where the world needs to be by 2020 on renewable energy, decarbonized and net-zero buildings, electrified or fuel-efficient transport, reforestation, decarbonized industry, and funding for climate action.

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